feat: add support for credential status for public credentials

proto/credential/v1/credential.proto

@@ -71,16 +71,20 @@ message PublicVerifiableCredential {
   // the date-time of expiration
   google.protobuf.Timestamp expirationDate = 6 [(gogoproto.stdtime) = true, (gogoproto.nullable) = true];
 
+  // credential status for the revocation lists
+  CredentialStatus credentialStatus = 7 [(gogoproto.nullable) = true];
+
+
   // the subject of the credential
   // the preferred way to handle the subject will be to use the Struct type
   // but at the moment is not supported
   // google.protobuf.Struct credentialSubject = 7;
-  bytes credentialSubject = 7;
+  bytes credentialSubject = 8;
 
   // One or more cryptographic proofs that can be used to detect tampering
   // and verify the authorship of a credential or presentation. The specific
   // method used for an embedded proof MUST be included using the type property.
-  Proof proof = 8;
+  Proof proof = 9;
 }
 
 
@@ -99,3 +103,14 @@ message Proof {
   string signature = 5;
 }
 
+// CredentialStatus implement support for biststring based revocation lists
+// as described here: https://w3c-ccg.github.io/vc-status-rl-2020/#revocationlist2020status
+message CredentialStatus {
+  option (gogoproto.equal) = true;
+  option (gogoproto.goproto_getters)  = false;
+
+  string id = 1;
+  string type = 2;
+  int64 revocationListIndex = 3;
+  string revocationListCredential = 4;
+}

scripts/seeds/03_credential_seeds.sh

@@ -20,6 +20,7 @@ echo "Sign and issue public credential"
 
 elestod tx credential issue-public-credential revocation-list-2020 03_credential.json \
  --export 03_credential.signed.json \
+ --non-revocable \
  --from regulator \
  --chain-id elesto -y --broadcast-mode block
 

x/credential/client/cli/tx.go

@@ -39,7 +39,10 @@ func GetTxCmd() *cobra.Command {
 // NewIssuePublicCredential defines the command to publish credential definitions
 func NewIssuePublicCredential() *cobra.Command {
 
-	var credentialFileOut string
+	var (
+		credentialFileOut string
+		nonRevocable      bool
+	)
 
 	cmd := &cobra.Command{
 		Use:     "issue-public-credential credential-definition-id credential_file",
@@ -65,6 +68,11 @@ func NewIssuePublicCredential() *cobra.Command {
 				println("error building credential definition", err)
 				return err
 			}
+			// is it revocable
+			if !nonRevocable && wc.CredentialStatus == nil {
+				println("credential status for revocation is missing, if this is intended use the flag --non-revocable", err)
+				return err
+			}
 			// get the issuer did
 			vmID := wc.GetIssuerDID().NewVerificationMethodID(signer.String())
 			if err = sign(wc, clientCtx.Keyring, signer, vmID); err != nil {
@@ -102,7 +110,7 @@ func NewIssuePublicCredential() *cobra.Command {
 	}
 	// add flags
 	cmd.Flags().StringVar(&credentialFileOut, "export", "", "export the signed credential to a json file")
-
+	cmd.Flags().BoolVar(&nonRevocable, "non-revocable", false, "if not set, the credential must contain the credentialStatus field")
 	flags.AddTxFlagsToCmd(cmd)
 	return cmd
 }